First, be aware that we don't provide support for 1.12.2 anymore, so if you're trying to use this version know that you're on your own if you run into issues.
Second, why are you asking instead of looking?
Try updating to a version of Storage Drawers that's made for 1.15.2 and not 1.14.4
Reminder: Mods are rarely ever compatible across Minecraft versions.
Logging into xFi and disabling Web Protect (or whatever it's called) works as well.
You should also be able to attempt to access the non-SSL (regular http, not https) version of the site and Xfinity should give you their threat page, where you should be able to accept the risk and have the block lifted.